Adjustable tool.



A. I. JACOBS.

ADJUSTABLE TOOL.

APPLICATION FILED NOV. 3, 191a.

Patented Apr. 7, 1914.

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Specification of Letters Patent.

Patented Apr. *7, 1914.

Application filed November 3, 1913. Serial No. 798,866.

To all whom it may concern:

Be it known that I, ARTHUR I. JAooBs, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Adjustable Tools, of which the following is a specification.

This invention relates to what I shall for convenience term adjustable tools.

My invention as will be inferredfrom its title, can be embodied with advantage in a variety of kinds of tools, especially those employed in the metal-working art, such for instance as rea-mers, taps, gageplugs, etc.

One of the primary purposes of the inven tion is the provision of an article of the character set forth, having simple and effective means by which a tool-member or equivalent, can be readily and quickly adjusted, for instance by being expanded or contracted. In some cases it may be necessary to merely expand the tool member, while in others both expansion and contraction thereof may be required, whereas in still others contraction may be merely desired. There may in fact, be instances where I would provide for an adjustment of an entirely different nature.

In the drawings accompanying and forming part of the present specification, I have shown in detail two of the many forms of embodiment of the invention, which toenable those skilled in the art to practise the same will be set forth fully in the following description. I do not restrict myself to this disclosure; I may depart therefrom in several respects within the scope of the invention defined by the claims following said description. In those two forms of the device which are illustrated in the drawings, the invention is represented as incorporated in an adjustable reamer.

Referring to said drawings: Figure 1 is a longitudinal sectional view of an adjustable tool involving my invention, the section being taken on the line l-l of Fig. 2. Fig. 2 is a transverse section on the line 22 of Fig. 1. Fig. 3 'is a view corresponding to Fig. 1 ofa dlffGIQIlUCOllStl'llCtlOIl. 3

Like characters refer to like parts throughout the several figures of the drawings.

The present tool comprises a body member and a tool-member, the latter constituting the effective or operative part of the implement, and, as will be assumed from what I have already stated, this tool-member may take various forms. It may be equipped w1th one or more tool portions to be utilized for reaming, tapping or otherwise, or it ma be plaln in which latter event the tool thus equipped would present what is known as a gage-plug or ring. WVhile these two parts may be of any desired character, I prefer that the body member be in the form of a shank and that the tool-member consist of an annulus, although the latter is not essential in all cases. This tool-member preferably has a bearing engagement against the body member at a plurality of points, being free between the bearing points, by virtue of which said tool member can be flexed or bent between said bearing points to vary the relation of said tool portions. \Vhen the tool member is provided with blades these blades are preferably rigid with the body of the tool member which condition is best secured by making the parts in question integral. I find in fact that I can with ad- Vantage make this annular tool member of continuous construction; that is to say it is not split or divided. The bearing relation between the tool-member and the body member can be obtained in different ways for example, by forming upon the tool-member several bearing projections, the tool member as will be understood being flexible between these bearing projections. The expansion or contraction of the tool member when provision is made therefor, can be obtained in several ways, best by a cam action. For instance the engaging surfaces of the toolmember and the body member can be on a taper.

With the foregoing general observations I will now refer more in detail to what is shown in the drawings. An elongated shank is illustrated at 2, the tip portion or head 3 of the shank being on a taper. Surrounding this tapered portion 3 is a sleeve 4:, con stituting a suitable tool-member, the shank 2 presenting a convenient body member. Upon this sleeve are shown several blades 5 which extend longitudinally and ordinarily from end to end of the sleeve exteriorly thereof and which are shaped to perform reaming. The blades or tool portions could, as will be understood, be of any other type and as already stated the sleeve could be circumferentially plain. This sleeve, as will be seen, is of continuous or unbroken cross section, and its expansion and contraction are obtained, therefore, not by opening or clos: ing a slit or slot, but by flexing and stressing the sleeve between several bearing points; This sleeve 4 is shown provided interiorly thereof with several longitudinally extending fins or ribs 6 which as shown, are radiw ally alined with the respective blades 5 and which have a bearing engagement against the tapered surface 3, the edges or bearing surfaces of the ribs or fins 6 being upon a taper corresponding with that of the portion 3. It will be clear, therefore, that the sleeve 4 between the bearing ribs or fins 6 can be bent or flexed owing to the fact that the sleeve between the laterally-separated ribs is resilient, which condition can be obtained by making the body of the sleeve between the ribs or fins of suitable thickness and consistency. hen the device is used for reaming or tapping, the blades 5 will be hardened at or around their active portion while said body of the sleeve between said fins will be preferably spring tempered.

The expansion or contraction of the sleeve is-seoured in the present instance by movin said sleeve longitudinally of the tapered portion 3, and this result can be obtained in various ways as already intimated, one of which will be hereinafter set forth. Means of a suitable'nature are provided for preventing the sleeve 4 from turning on the tapered portion 3, and this function may be obtained in a simple manner by keying the two parts together, for instance, the tapered portion 3 may have a circular keyway 7 to receive the key 8,which slidingly fits between two adjacent ribs or fins 6 to thus permitlongitudinal movement of the sleeve 4 on the shank 2. Said shank just back of the tapered portion 3 is circumferentially reduced as at 10 to rotatively receive the internal plain portion of the nut 11, the formation of this reduced portion 10 producing the shoulder 12 against which the nut 11 bears. The threaded portion 13 of the nut engages the threaded portion 14 of the sleeve, so that when the nut is rotated, the sleeve 4 may be moved backwardly or forwardly on the tapered portion 8 depending on the direction of rotation of said nut. Said nut is provided with one or more peripheralsockets 15 to receive a suitable implement to facilitate its rotation and is backed up by the check nut 16 threaded onto the shank 2 and also having sockets 17 When the tool-member or sleeve 4 is to be adjusted, the nut 16 is operated to move it slightly out of contact with the companion nut 11 when the latter is turned to secure either the expansion or contraction of the sleeve 4, and when the necessary adjustment is obtained, the nut 16 is moved into solid engagement with the nut 11 and the latter thus caused to substantially engage the shoulder 12.

7 In Fig. 3 I show a modified form of the device, the shankbeing denoted by 20. In this case the head 21 instead of being on an inward taper is onan outward taper, in fact just the reverse of the tapered portion 8. The sleeve 22 has the external tool portions or blades 23 and the internalribs or fins 24, the edge portionsof which are on a taper corresponding with the head 21. There is also a key 25 supported by the tapered portion 21 and fitting for sliding movement a longitudinal keyway between two of the interior ribs or fins 24. Except as to the difference mentioned with respect to the taper, the two tools thus far described are similar. The adjustment of, the sleeve 22 is also effected in a little different-way, the nut27 being shown for such purpose. This nut is threaded directly onto the shank 20 and abut against the inner end of the sleeve 22 so that by moving said nut'27 toward the taper it will be fed forward or outward to thereby impart a correspondingcmovement to the sleeve 22 and thus eifect the expansion of said sleeve.

What I claim is:

.1. A tool comprising an annular toolmember, a body member on which the tool member is mounted, the tool member engaging the body member at a plurality of separated points and being resilient between such points, and means for flexing the tool member-between said points.

2. A tool comprising an annular toolmember, a body member on which the tool member is mounted, the tool memberengaging the body member at a plurality of separated points and being resilient between the points, and cam means for flexing the tool member between the points. 8. A tool comprising an annular tool member, a body member on which the tool member is mounted, the tool member engag ing the body member at a plurality of sepa-, rated points and being resilient between the bearing points, means for keying the tool member to the body member to prevent rotation of one with respect to the other, and means for flexing the tool member between the bearing points.

4. A tool comprising an annular tool member, a body member on which the 'tool member is mounted, the tool member engaging the body member at a plurality of points and being resilient between said points, means for moving the .tool member longitudinally of the body member, means for preventing rotation of said tool member with respect to the body member, and means for flexing the tool member between the bearing points. 2' V 5. A tool comprising an annular tool member, a body member on which the tool member is mounted, the toolmember having a plurality of interior ribs engaging the body at laterally separated points and being resilient between the ribs, and means for flexing the tool member between said ribs.

6. A tool member comprising a shank having a tapered portion, a sleeve surrounding said tapered portion and having laterally separated bearing portions, which engage said tapered portion, the engaging surfaces of said bearing portions being on a corresponding taper and the sleeve between said bearing portions being resilient, and means for moving said sleeve longitudinally of said tapered portion.

7. An article of manufacture comprising an annular tool member having a plurality of laterally separated bearing points, the tool member being resilient between said bearing points.

8. An article of manufacture comprising an annular tool member having on at least one side thereof several projections, the tool member between the projections being resilient.

9. An article of manufacture comprising an annular tool member provided interiorly and eXteriorly with projections, one series of projections constituting bearing projections and the other constituting tool portions, the tool member between the projections being resilient.

10. An article of manufacture comprising an annular tool member of continuous construction, provided interiorly with several bearing ribs, said tool member between said ribs being resilient.

11. An article of manufacture comprising an annular tool member of continuous construction, provided interiorly with several bearing ribs, said tool member between said ribs being resilient and also having a series of external tool portions.

In testimony whereof I afiix my signature in presence of two witnesses.

ARTHUR I. JACOBS.

Witnesses:

HEATH SUTI-IERLAND, L. L. lWARKEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

